443999

Trimethyl borate

purified by redistillation, ≥99.5%

• Synonym(s): Boric acid trimethyl ester, Methyl borate
• Linear Formula: B(OCH₃)₃
• CAS Number: 121-43-7
• Molecular Weight: 103.91
• Beilstein: 1697939
• EC Number: 204-468-9
• MDL number: MFCD00008346
• UNSPSC Code: 12352103
• PubChem Substance ID: 24868093
• NACRES: NA.22

Properties

• vapor density: 3.59 (vs air)
• Assay: ≥99.5%
• form: liquid
• purified by: redistillation
• refractive index: n20/D 1.346 (lit.)
• bp: 68-69 °C (lit.)
• mp: −34 °C (lit.)
• density: 0.932 g/mL at 20 °C (lit.)
• SMILES string: COB(OC)OC
• InChI: 1S/C3H9BO3/c1-5-4(6-2)7-3/h1-3H3
• InChI key: WRECIMRULFAWHA-UHFFFAOYSA-N

Description

Application

Trimethyl borate can be used as:

• A reagent in the preparation of various trialkylamine−boranes from corresponding trialkylamines using lithium hydride/aluminum chloride catalyst.
• A source of boron in the synthesis of boron nitride (BN) nanotubes by thermal-heating chemical vapor deposition (TH-CVD) method.
• An electrolytic additive for electrochemical applications.
• A reagent along with lithium di-tert-butyl(2,2,6,6-tetramethylpiperidino)zincate (TMP-zincate) for the synthesis of 1-tert-butyl-3,4-dihydroisoquinoline from isoquinoline via ortho metalation reaction.

Safety Information

• Pictograms: GHS02,GHS06,GHS08
• Signal Word: Danger
• Hazard Statements: H225,H301 + H311 + H331,H319,H360FD,H370
• Precautionary Statements: P210 - P280 - P301 + P310 - P303 + P361 + P353 - P304 + P340 + P311 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Eye Irrit. 2 - Flam. Liq. 2 - Repr. 1B - STOT SE 1
• Target Organs: Eyes
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 1
• Flash Point(F): 12.2 °F - (own results)
• Flash Point(C): -11 °C - (own results)
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves